<div class="add_panel">
    <el-tabs tab-position="left">
        <el-tab-pane label="添加动作">
          <div v-for="item in nodeList" :key="item.type">
            <el-button class="add-node-btn" type="primary" size="mini" @click="$_addNode(item)">{{item.label}}</el-button>
          </div>
        </el-tab-pane>
        <el-tab-pane label="添加组">
          <el-button class="add-node-btn" type="primary" size="mini" @click="$_addTempalte">模板</el-button>
        </el-tab-pane>
      </el-tabs>
</div>